Would anyone care to explain the Loop of Henle and why the descending branch is more concentrated but permeable to water and vice versa for the ascending loop?
Going down the loop on Henley, the membrane is permeable to water. Thus, water leaves leaving ions and other solutes. Going up the loop of henle, the membrane is permeable to ions and other solutes. Thus, ions and solutes leave. Because both water and solute have left, the concentration is still constant.
Would anyone care to explain the Loop of Henle and why the descending branch is more concentrated but permeable to water and vice versa for the ascending loop?
descending loop - permeable to water...hence passive flow of water out of the tube which will make the urine more concetrated.
ascending loop - impermeable to water so no water movement, but active/passive movement of salts out of the tube...hence will make the urine more dilute
Then it (dilute) enters collecting tube..which has concentrated fluid surrounding it, hence osmosis occur higher conc (urine which is dilute) to lower conc (interstitial fluid which is conc).
Thus the urine that finally enters the pelvis is concentrated.
Where do B-cells develop? Destroyer says fetal liver and spleen. Q 70 . But I was looking at other places that say B cells develop in bone marrow. Ideas?
Where do B-cells develop? Destroyer says fetal liver and spleen. Q 70 . But I was looking at other places that say B cells develop in bone marrow. Ideas?
Where do B-cells develop? Destroyer says fetal liver and spleen. Q 70 . But I was looking at other places that say B cells develop in bone marrow. Ideas?
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